Fix parsing hash options with line breaks

zordius/lightncandy#310

Author: theodorejb

src/Parser.php

@@ -239,8 +239,8 @@ protected static function advancedVariable(array $vars, Context $context, string
                 continue;
             }
 
-            if (preg_match('/^((\\[([^\\]]+)\\])|([^=^\\["\']+))=(.+)$/', $var, $m)) {
-                $idx = $m[3] ? $m[3] : $m[4];
+            if (preg_match('/^((\\[([^\\]]+)\\])|([^=^\\["\']+))=(.+)$/s', $var, $m)) {
+                $idx = $m[3] ?: $m[4];
                 $var = $m[5];
                 // handle foo=(...)
                 if (preg_match(SafeString::IS_SUBEXP_SEARCH, $var)) {

tests/RegressionTest.php

@@ -1311,6 +1311,27 @@ public static function issueProvider(): array
                 'expected' => '',
             ],
 
+            [
+                'id' => 310,
+                'template' => <<<_tpl
+                    {{#custom-block 'some-text' data=(custom-helper 
+                      opt_a='foo'
+                      opt_b='bar'
+                    )}}...{{/custom-block}}
+                    _tpl,
+                'options' => new Options(
+                    helpers: [
+                        'custom-block' => function ($string, HelperOptions $opts) {
+                            return strtoupper($string) . '-' . $opts->hash['data'] . $opts->fn();
+                        },
+                        'custom-helper' => function (HelperOptions $options) {
+                            return $options->hash['opt_a'] . $options->hash['opt_b'];
+                        },
+                    ],
+                ),
+                'expected' => 'SOME-TEXT-foobar...',
+            ],
+
             [
                 'id' => 315,
                 'template' => '{{#each foo}}#{{@key}}({{@index}})={{.}}-{{moo}}-{{@irr}}{{/each}}',